1 . On August 15,a team of researchers and conservationists set off on a two-year voyage from Plymouth, England,on board the Dutch tall ship Oosterschelde. They will sail more than 46,000 miles(74,000 kilometers)and drop anchor in 32 different ports across four continents,before ending their journey in Falmouth,U.K.
The expedition, named Darwin200,comes more than 190 years after Charles Darwin sailed the globe collecting specimens and shaping ideas of his theory of evolution. The team will closely follow Darwin’s original voyage aboard the HMS Beagle, which set off on Dec.27,1831,and returned to England on Oct.2,1836.
Darwin was 22 years old when he joined the expedition with the intention of seeing the world before joining the church. But during the trip, Darwin became fascinated by the wide range of different species he encountered, which eventually led to him creating his theory of evolution by natural selection. Darwin’s account of the journey, published after his return, also helped him establish his reputation as one of Victorian Britain’s academic elite.
The main aim of the new expedition is to train and inspire 200 young environmentalists, between 18 and 25 years old, who will each spend a week on board the Oosterschelde studying threatened species that Darwin encountered on his voyage.
“We wanted to create a similarly transformative experience(for the young naturalists),”Stewart MePherson, mission director of Darwin200,said in a statement. They have” the potential to be the STEM (science, technology, engineering, and mathematics)and conservation leaders of tomorrow,” he added.
Every week, the team will broadcast interactive “nature hour” sessions live from the ship for people across the world. They will also collect important data on ocean plastics and coral reef health,as well as survey seabirds, whales and dolphins.
1. What can we learn about Darwin200 from the first two paragraphs?| A．It takes along 200 naturalists. | B．It takes a shortcut for the journey. |
| C．It is to mark Darwin’s Beagle voyage. | D．It lasts longer than Darwin’s voyage. |
| A．It established his writing style. | B．He gained a sense of adventure. |
| C．He earned great fame and fortune | D．It changed the direction of his life. |
| A．To be more creative. | B．To keep an open mind. |
| C．To develop scientific skills. | D．To challenge Darwin’s theory. |
| A．Ocean conservation. | B．The exploration of ocean. |
| C．The art of navigation. | D．Scientific education. |
In downtown Xiamen, Fujian Province, a 6-meter-high mound(土堆) that stretches for 60 to 70 meters stands in contrast to the high-rise
The blue-tailed bee-eater, or Merops philippinus, is known for its colorful plumage and on the Chinese mainland it
In recent years, with improved environmental conditions in Xiamen and the city government’s commitment
In 2015, the center
The birds,
The 13-year experience of preserving blue-tailed bee-eaters has given the center a grasp of their habits and made the Wuyuanwan Nature Reserve a stable home for them.
1. What can we say about the weather on Sunday?
| A．It was fine. | B．It was hot. | C．It was changeable. |
| A．It’s beyond their expectations. |
| B．It’s a common phenomenon. |
| C．It’s caused by climate change. |
4 . How to limit your environmental impact while travelling
Travelling unlocks a world of endless possibilities and adventures, allowing us to hike through breathtaking landscapes, encounter kangaroos and deer in their natural habitat, and witness the power of volcanoes.
Try to travel by land instead of air. While air travel can often be quicker, it is typically one of the most polluting forms of transport.
Make the most of safe tap water (自来水). Drinking tap water may come as a shock to many travelers. But when you’re in countries where tap water is safe to consume, avoid bottled options. Not only are they more expensive, but they have a higher level of pollution compared to treated tap water.
Respect the local environment. When visiting different destinations, we should recognize the importance of protecting the natural beauty. We mustn’t throw rubbish everywhere.
| A．Be a responsible hotel guest. |
| B．Explore with green tour companies. |
| C．Instead, carry a bottle and refill it wherever you can |
| D．And we should avoid activities that may harm wildlife. |
| E．However, tourism can also be harmful to the environment. |
| F．Low-cost airlines have made it much more affordable to travel. |
| G．Taking the train or driving in some countries may be better options. |
5 . Like many of the Indigenous (土著的) communities across the Australian continent, the remote communities in north-west New South Wales are struggling. Many of the 300 or so residents rely on welfare. Higher electricity bills—up to $3,000 a quarter for some households—further worsen the poverty. They’re always at the end of the power line, so the service that is there is quite extraordinary in terms of cost. It’s a real problem that needs to be fixed.
To that end, Anderson and other Indigenous leaders have formed the First Nations Renewable Energy Alliance (FREA) to push for renewable energy in Indigenous communities. They partner with private enterprise to support Indigenous communities looking to switch to renewable energy.
“We can build a power station where the community exists,” Anderson says, “so people are able to successfully live in the environment the way they want to live and have access to power which enables them to better determine their economic future.”
Only a handful of Indigenous communities have set up renewable energy projects in Australia. The Indigenous-owned and -operated company AllGrid Energy, for instance, has installed solar panels and battery storage systems to replace diesel (柴油) generators in the communities of Ngurrara and Kurnturlpara in the Northern Territory’s Barkly Tableland. Within two months of the system being installed in May 2016, people were moving back to their homelands, the communities growing from just two permanent residents to about 40.
But FREA will go one step further, working with community leaders and acting as a conduit (纽带) between the communities and the businesses they are dealing with. This is essential, says Anderson, to avoid predatory (吞并) practices they have seen in the past, with companies “playing on the psychology of poverty” to gain advantage. The FREA has drafted terms of agreements that will guide how companies engage with Indigenous communities for renewable energy projects.
One of the next steps for FREA will be to identify a community that can act as a test case for a renewables project. “Our experience is that if we can make it work for one community, it will work in every other community,” Anderson says.
1. What is FREA expected to do for the remote Indigenous communities?| A．Increase power supply to them. | B．Help them return to their homelands. |
| C．Shake them off poverty. | D．Reduce their higher power costs. |
| A．Renewables projects are inaccessible. |
| B．Renewables projects are quite workable. |
| C．Renewables projects can increase locals’ income. |
| D．Renewables projects can coexist with diesel power plants. |
| A．Its strategies to win over the businesses. | B．Its cooperation with community leaders. |
| C．Its potential conflict with energy companies. | D．Its innovation in directing renewables projects. |
| A．Consult the experts. | B．Select a piloting community. |
| C．Collect sufficient construction fund. | D．Make renewables projects available to all. |
6 . Until recently, gravitational waves could have been the stuff of Einstein’s imagination. Before they were detected, these waves in space time existed only in the physicist’s general theory of relativity, as far as scientists knew. Now, researchers are on the hunt for more ways to detect the waves. “The study of gravitational waves is booming,” says astrophysicist Karan Jani of Vanderbilt University in Nashville. “This is just remarkable. No field I can think of in fundamental physics has seen progress this fast.”
Just as light comes in a variety of wavelengths, so do gravitational waves. Different wave lengths point to different types of origins of the universe and require different kinds of detectors. Gravitational waves with wavelengths of a few thousand kilometers—like those detected by the United States, Italy and Japan—come mostly from pairs of black holes 10 or so times the mass of the sun, or from collisions of dense cosmic blocks called neutron stars (中子星). These detectors could also spot waves from certain types of exploding stars and rapidly moving neutron stars.
In contrast, huge waves that span light-years are thought to be created by orbiting pairs of bigger black holes with masses billions of times that of the sun. In June, scientists reported the first strong evidence of these types of waves by turning the entire galaxy (星系) into a detector, watching how the waves make slight changes to the timing of regular blinks from neutron stars throughout the Milky Way.
Physicists now hope to dive into a vast, cosmic ocean of gravitational waves of all sorts of sizes. These waves could reveal new details about the secret lives of exotic objects such as black holes and unknown parts of the universe.
Physicist Jason Hogan of Stanford University thinks there are still a lot of gaps in the coverage of wavelengths. “But it makes sense to cover all the bases. Who knows what else we may find?” he says. The search for capturing the full complement of the universe’s gravitational waves exactly could take observatories out into the moon, to the atomic area and elsewhere.
1. What does Karan Jani think of the current study on gravitational waves?| A．It is rapid and pioneering. |
| B．It is slow but steadily increasing. |
| C．It is interrupted due to limited detectors. |
| D．It is progressing as fast as any other field. |
| A．The creation of different kinds of detectors. |
| B．Collisions of planets outside the solar system. |
| C．The presence of light in different wavelengths. |
| D．Activities involving black holes and neutron stars. |
| A．By analyzing sunlight. |
| B．By locating the new galaxy. |
| C．By using the whole galaxy as a tool. |
| D．By observing the sun’s regular movement. |
| A．It’ll exclude the atomic field. |
| B．It’ll focus exactly on the mapping of the galaxy. |
| C．It’ll require prioritizing certain wavelengths on the moon. |
| D．It’ll explore potential places to detect gravitational waves. |
7 . Historical accounts often described the now-extinct California grizzly bears as huge beasts ready to attack humans and livestock at any time. But according to a new paper, scientists say the truth might have been less dramatic: The bears ate a mostly vegetarian diet and were smaller than previously described. California grizzly bears once roamed in the Golden State. But European settlers often hunted, poisoned and trapped the creatures. Over time, because of these human activities, the California grizzly population declined. The last reliable sighting of a California grizzly bear occurred 100 years ago in 1924, and the animals disappeared completely sometime after that.
Researchers wanted to get a better understanding of the factors that accelerated the bears’ extinction. They also hoped to gain more insight into the creatures’ behavior, size and diet. To do so, they turned to documents and California grizzly specimens in natural history collections. They measured the animals’ skulls and teeth and analyzed their bones and pelts. The researchers found that California grizzly bears were much smaller than the 2,000 pounds often reported at the time. Historical accounts might not necessarily have been wrong, but they might have only included the largest bears. In addition, analyses of the animals’ bones and skins suggest the bears were primarily eating plants, which stands in contrast to their fear some hyper carnivorous (超级食肉的) reputation. “The bears likely increased meat consumption due to landscape changes coupled with the arrival of livestock,” says study co-author Alexis Mychajliw. However, researchers found the animals still ate a majority vegetarian diet and killed far less livestock than historical accounts suggested.
By digging beyond the bears’ reputation, the researchers gained a more accurate understanding of the California grizzly’s biology and natural history. And since scientists and land managers often rely on historical accounts when reintroducing animals to their former habitats, the study serves as a reminder that those old newspapers and journals do not tell the whole story.
1. What does the underlined word “roamed” in paragraph 1 mean?| A．Disappeared. | B．Declined. | C．Fought. | D．Wandered. |
| A．They mainly fed on livestock. |
| B．Their diet consisted mostly of plants. |
| C．They ate a balanced diet of plants and meat. |
| D．The absence of livestock changed their dietary habit. |
| A．They are unique. | B．They are one-sided. |
| C．They are accurate. | D．They are comprehensive. |
| A．The natural habitats of California grizzly bears. |
| B．The extinction process of California grizzly bears. |
| C．The reveal of the truth of California grizzly bears. |
| D．The significance of the arrival of California grizzly bears. |
1. What will the weather be like tomorrow afternoon?
| A．Sunny. | B．Snowy. | C．Rainy. |
| A．Visit his friends another day. | B．Stick to his plan. | C．Stay at home. |
| A．Training. | B．Relaxing. | C．Learning. |
| A．In Birmingham. | B．In Worcester. | C．In London. |
9 . Any schoolchild knows that a whale breathes through its blowhole. Fewer know that a blowhole is a nostril (鼻孔) slightly changed by evolution into a form more useful for a mammal that spends its life at sea. And only a dedicated expert would know that while toothed whales, such as sperm whales, have one hole, baleen (鲸须) whales, such as humpback and Rice whales, have two.
Even among the baleen whales, the placing of those nostrils differs. In some species they are close together. In others, they are much further apart. In a paper published in Biology Letters Conor Ryan, a marine biologist at the Scottish Association for Marine Science, suggests why that might be. Having two nostrils, he argues, helps whales smell in stereo (立体空间).
Many types of baleen whales eat tiny animals known as zooplankton (浮游动物), which they catch by filtering (过滤) them from seawater using the sheets of fibrous baleen that have replaced teeth in their mouths. But to eat something you first have to find it. Toothed whales do not hunt by scent. In fact, the olfactory bulb—the part of the brain that processes smell—is absent in such creatures. But baleen whales still have olfactory bulbs, which suggests smell remains important. And scent can indeed give zooplankton away. Zooplankton like to eat other tiny creatures called phytoplankton (浮游植物). When these are under attack, they release a special gas called dimethyl sulphide, which in turn attracts baleen whales.
Most animals have stereoscopic senses. Having two eyes, for instance, allows an animal to compare the images from each in order to perceive depth. Having two ears lets them locate the direction from which a sound is coming. Dr Ryan theorized that paired blowholes might bring baleen whales the same sorts of benefits.
The farther apart the sensory organs are, the more information can be extracted by the animal that bears them. The researchers used drones to photograph the nostrils of 143 whales belonging to 14 different species. Sure enough, baleen whales that often eat zooplankton, such as the North Atlantic right whale, have nostrils that are farther apart than do those, such as humpback whales, that eat zooplankton occasionally. Besides allowing them to breathe, it seems that some whales use their blowholes to determine in which direction dinner lies.
1. What do we know about whales’ nostrils according to the first two paragraphs?| A．They are adapted ones. | B．They are developed merely for smell. |
| C．They are not easy to detect. | D．They are fixed universally in numbers. |
| A．The teeth that baleen whales have. |
| B．The smell that phytoplankton send. |
| C．The sound waves that zooplankton create. |
| D．The chemical signals that zooplankton give off. |
| A．By quoting a theory. | B．By using examples. |
| C．By making contrast. | D．By making inferences. |
| A．The sense of smell. | B．The possibility to attract food. |
| C．The ability to locate food. | D．The ability to communicate. |
10 . Space weather forecasters have issued a geomagnetic storm watch through Monday, saying an outburst of plasma from a solar flare could interfere with radio transmissions on Earth. It could also make for great aurora viewing.
There’s no reason for the public to be concerned, according to the alert issued on Saturday by the U.S. National Oceanic and Atmospheric Administration’s (NOAA) Space Weather Prediction Center in Boulder, Colorado.
The storm could interrupt high-frequency radio transmissions, such as by aircraft trying to communicate with distant traffic control towers. Most commercial aircraft can use satellite transmission as backup, said Jonathan Lash, a forecaster at the center.
Satellite operators might have trouble tracking their spacecraft, and power grids could also see some “induced current” in their lines, though nothing they can’t handle, he said. “For the general public, if you have clear skies at night and you are at higher latitudes, this would be a great opportunity to see the skies light up,” Lash said.
Every 11 years, the sun’s magnetic field flips, meaning its north and south poles switch positions. Solar activity changes during that cycle, and it’s now near its most active phase, called the solar maximum. During such times, geomagnetic storms of the type that arrived on Sunday can hit Earth a few times a year, Lash said. During solar minimum, a few years may pass between storms. In December, the biggest solar flare in years disrupted radio communications.
1. What is the main topic of the passage?| A．The effects of solar flares on Earth. |
| B．The causes of geomagnetic storms. |
| C．The work of the Space Weather Prediction Center. |
| D．The beauty of aurora displays. |
| A．Avoid using high-frequency radios. |
| B．Prepare for possible power outages. |
| C．Enjoy the aurora if conditions are right. |
| D．Stay indoors during geomagnetic storms. |
| A．They use satellite transmission as backup. |
| B．They communicate with nearby traffic control towers. |
| C．They are equipped with special radios for such events. |
| D．They avoid flying during periods of high solar activity. |
| A．Every few months. |
| B．Once or twice a year. |
| C．Once every 11 years. |
| D．Only during solar minimum. |
